papadingo - Thanks for the info. I guess the old saying "be careful of what you read on the internet as there is a lot of misinformation" holds true here as I have read in several places that the the "af" suffix was from the 2005's and the pre F-37 TCM. So if I want to find one that does not have the detune I would need to find an "ab" suffix that has not been molested.
papaindigo wrote:
Don't waste your time or money hunting a tool for this purpose as it's not needed to prove your point. In addition to the ca. 62mph final shift point on a post F-37 TCM being a dead bang no brainer clue; the "af" suffix is for a 2006 TCM which by definition came from the factory with the F-37 detune (aka 2006 stock TCM tune). The 2005 TCM suffix is "ab" and that's the one that was flashed post production to the F-37 detune or maybe not if the CRD owner found a cooperative mechanic who would do the torque convertor check/replacement and overlook flashing the TCM.